CakePHP Unable to access array in nested model - arrays

Question

I have a nested associated model based on
Project=>ProjectDocument=>ProjectDocumentSection=>ProjectDocumentSectionVariable=>Codeset=>Code
I am using containable behaviour to get a specific array with these elements (for a single project).
I have set up associations for these models in their respective models.
Using foreach I am able to interrogate all the data up to an including the ProjectDocumentSectionVariable level.
However, once I try to go to the Codeset level, I get errors.
The pertinent code is:
foreach ($project['ProjectDocument'] as $project_document):
if ($project_document['document_type'] == 1)
{
foreach ($project_document['ProjectDocumentSection'] as $project_document_section):
echo "<h4>" . $project_document_section['title']. "</h4><div><table><th>Variable</th><th>Full text</th><th>Type</th><th>Format</th><th>Codeset</th>" ;
foreach ($project_document_section['ProjectDocumentSectionVariable'] as $project_document_section_var):
echo "<tr><td>" . $project_document_section_var['variable_name']
. "</td><td>".$project_document_section_var['variable_description']
. "</td><td>".$project_document_section_var['variable_type']
."</td><td>".$project_document_section_var['variable_format']
."</td><td>".$project_document_section_var['codeset_id'] ;
foreach($project_document_section_var['Codeset'] as $codeset):
foreach($codeset['Code'] as $pcode):
echo $pcode['codevalue'].", ";
endforeach;
endforeach;
echo "</td></tr>";
endforeach;
echo "</table></div>";
endforeach;
}
endforeach;
But I get Illegal string offset 'Code', and Invalid argument supplied for foreach() at the line echo $pcode['codevalue'].", ";
I have looked at the array for $project_document_section_variable and I think there is a problem with the codeset array, but I cannot work out why it is doing this.
Here is an example of some output for the array $project_document_section_variable:
array(
'id' => '32',
'project_id' => '05a',
'project_document_id' => '3',
'project_document_section_id' => '2',
'variable_id' => '2',
'variable_name' => 'Respondent Education',
'variable_description' => 'B1. What is your highest level of education?',
'variable_type' => 'Categorical',
'variable_format' => 'Quantitive',
'codeset_id' => '43',
'Codeset' => array(
'id' => '43',
'title' => 'Educational level',
'Code' => array(
(int) 0 => array(
'id' => '96',
'codeset_id' => '43',
'codevalue' => '1',
'title' => 'No education'
),
(int) 1 => array(
'id' => '97',
'codeset_id' => '43',
'codevalue' => '2',
'title' => 'Primary'
),
(int) 2 => array(
'id' => '98',
'codeset_id' => '43',
'codevalue' => '3',
'title' => 'Secondary'
),
(int) 3 => array(
'id' => '99',
'codeset_id' => '43',
'codevalue' => '4',
'title' => 'Tertiary'
),
(int) 4 => array(
'id' => '100',
'codeset_id' => '43',
'codevalue' => '7',
'title' => 'Other (describe)'
),
(int) 5 => array(
'id' => '101',
'codeset_id' => '43',
'codevalue' => '8',
'title' => 'Refuses to answer'
),
(int) 6 => array(
'id' => '102',
'codeset_id' => '43',
'codevalue' => '9',
'title' => 'Don’t know'
)
)
)
)
You may notice that the codeset array does not have an (int) 0. perhaps this is because only one array is returned for codeset (which is correct, each project_document_section_variable has only one associated codeset.
Is there something blindingly obvious I am missing here?

Answer 1

This line -> foreach($project_document_section_var['Codeset'] as $codeset): is making php assign ['id'], ['title'], and ['Code'] to $codeset.
This line -> foreach($codeset['Code'] as $pcode): is making php looks for ['id']['Code'], ['title']['Code'], and ['Code']['Code'] which don't exists and raise the error.
Try replacing this:
foreach($project_document_section_var['Codeset'] as $codeset):
foreach($codeset['Code'] as $pcode):
echo $pcode['codevalue'].", ";
endforeach;
endforeach;
For this:
foreach($project_document_section_var['Codeset']['Code'] as $pcode):
echo $pcode['codevalue'].", ";
endforeach;